Partial



Jan, 7, 1g47. L, R QRQSMAN ZA-HQQZ? PARTIAL PRODUC T S TRUC TURE FiledNov. 20, 1945 6 Sheets-Sheet 1 ZAMMZ? Jan. 7, 1947. L. P. CROSMANPARTIAL PRODUCT STRUCTURE 6 Sheets-Sheet 2 Filed Nov. 20, 1945 PINVENTOR 1259 has ham BY (/t z ATTORNEY Jan. 7, 19 7.. L. P. CROSMANPARTIAL PRODUCT STRUCTURE e Sheets-Sheet Filed Nov. 20, 1945 g /M I Jan.7, 1947. CROSMAN 2,414,027

PARTIAL PRODUCT STRdCTURE Filed Nov. 20, 1945 6Sheecs-Sheet E kaaINVENTOR W/T/VHS Ianingu? I'm mm I wTTORNEY Patented Jan. 7, 1947 UNITEDSTATES PATENT OFFICE PARTIAL PRODUCT STRUCTURE Application November 20,1945, Serial No. 629,777

1 Claim. 1

The invention relates to an improved means for selecting and registeringpartial products in multiplying machines.

In prior decimal system machines of this type the graduation of thepartial product plates representing the units and those representing thetens digits of the partial products related to a given multiplier digithave consisted of series of stepped faces of eight or nine steps each,with a corresponding extension of the plates in two of their dimensions.This, together with similar provision for the remaining multiplierdigits, and the duplication of the entire partial product table in eachdenominational order of the machine, has resulted in the employment ofan assembly of plates of considerable mass and extent. The presentinvention provides means for employing a lighter, more compact plateassembly, and it consists in the novel construction and combination ofparts, as set forth in the appended claim.

In the accompanying drawings illustrating the invention:

Fig. 1 is a vertical section taken through the factor keyboard of alisting machine to which the invention has been applied.

Fig. 2 is a left side elevation showing various multiplication controldevices.

Fig. 3 is an enlarged left side elevation of the factor value lockingmeans and of certain multiplication control cams.

Fig. 4 is a vertical section taken through the parts lying forward ofthe keyboard.

Fig. 5 is a detail perspective view of a portion of the units feeleractuating means.

Fig. 6 is an axial section through the partial product plates.

Fig. '7 is a detail right side elevation of the partial producttransmission means.

Fig. 8 is a section taken on line 8-8, Fig. i.

Fig. 9 is a detail plan view of the tens feelers and associated parts.

Fig. 10 is a series of detail elevations showing the five partialproduct plates.

Fig. 11 is a timing diagram illustrating the movements of various parts.

The five partial product plates herein illustrated provide for theproducts involving the multiplier digits from 1 to 5. (Jo-pendingapplication Serial No. 629,841, filed by Howard M. Fleming, of even dateherewith, and entitled Mul- .tiplying machine shows means whereby thesefive '-plates may be used to control the registration of productsinvolving all or the multiplier digits from 1 to 9, but since the meansfor effecting this result form no part of the present invention, theyhave not been shown in the present application. However, in so far asthe disclosure of the Fleming application may be pertinent as providingfor an advantageous application of the present invention in a completemachine, such disclosure is made of record.

Alternative arrangements, coming within the scope of the presentdisclosure, will be considered more conveniently in connection with thedetailed description of structure.

Entering the factors In accordance with above noted disclosure, amountsset up by the digit keys 2l5 (Fig. 1) may be transferred to anaccumulator i 3, upon operation of the machine, by means of a series ofdifferential actuators 6lii. These differential actuators are springoperated, and are normally restrained by frame Hi6. Each actuator Sillis fulcrumed at 608, a forward arm thereof having segmental. gear teethfor rotating an accumulator wheel and an upper arm being pivotallyconnected with a digit index bar M5. The actuators are normally heldunder restraint of a series of column latches 2 M, each latch beingreleasable upon depression of any key 255 in the same column by means ofa slide 2 l3. Upon operation of the machine and consequent movement ofthe frame 6 l 6, the released actuators will be rotated counter--clockwise each until stopped by contact of a lug of the related indexbar Gilli with the stem of a depressed key.

The multiplicancl is set up on keys 2|5, and the partial product platesare adjusted accordingly during a non-add operation of the actuators 5m.During this operation accumulator 413 is moved out of mesh with theactuator segments, and a cam till (Fig. 2) is rocked by a shaft Sill, toreciprocate frame Sit in known manner.

The setting movements imparted to the actuators Bill during the forwardstroke or cam 3H5 are transmitted to related stop plates 536 (Fig. 1),loosely mounted upon a shaft 53'! and held in contact with the actuatorsby springs At the end of this forward stroke the stop plates are lockedin adjusted positions by engagement of a rotary bar 569 with graduatedfaces of said plates. Bar 509 is rocked into locking engagement with thestop plates 595 by contact of a projection 5H3 (Fig. 3) of cam 3E8 with2. lug 5| I of pivoted arm 5I2, contacting an arm 5&9 of said bar, thelocking engagement. being maintained during thereturn stroke of the camby engagement of a spring latch 513 with lug 5! I. At

3 the end of the return stroke of the parts, latch E3 will be lifted bya pin 5H1 mounted in the cam, and bar 589 will be rocked to unlockingposition by a spring 5l5.

During that portion of the non-add cycle in which the multiplicand valueis locked in the plates 566, a series of feelers will be brought intocontact with said plates, whereby the values will be entered in thepartial product plates.

For this purpose a bail 528 (Fig. 4) is rocked clockwise, said baillying in rear of a series of spring impelled segments '529, looselymounted upon a shaft 536. Upon release from the restraint of bail 528,the segment springs 53] will rotate the segments clockwise until feelers532, pivotally connected thereto, come into contact with studs 533 ofthe adjusted stop plates 506.

The segments 523 mesh with intermediate gear members 5%, meshing in turnwith gears 531', each rotatably connected to a series of five partialproduct plates 538 (Figs. 6, '7, mounted upon a sleeve supported upon ashaft 539. Clockwise rotation of the related segments 529 will thusrotate the partial product plates 538, each series of plates a number ofsteps (from one to nine) in accordance with the multiplicand value setin the corresponding stop plate 506. e

As shown, a partial product plate is provided to represent the productsof each multiplier digit, and the multiplier is selected by moving theseries of plates laterally, to bring the required plates opposite thefeelers which control the registration. For this purpose, it may benoted, the intermediate gearing 534 is swung forward, out of mesh withthe gears 53?. Obviously, with a different arrangement of the valuesupon the partial product plates, a different method of multiplierselection might be employed.

Registering the partial products The multiplication is effected byrotation of an operation control shaft 56? (Figs. 2 and 3) upon whichare mounted a series of cams which act to determine the calculation andregistration of the partial product values.

Cam 868 (Fig. 3) operates the units value feelers, this being the firstoperation effected during additive calculations (see diagram, Fig; 11).A spring urged cam follower 669 is rocked counterclockwise by cam 868,said follower, through link Elli and bell-crank lever fill, rocking ashaft 673. Shaft 6'53 has link connection fi'lZ with a pair of armssupported upon shaft EM (Figs. 4 and 7) and having pivotal connection616 with a pair of hangers Eli (Fig. 5) engaging perforations of twospaced bars 518, riveted together to form a rigid frame. This frame hasyieldable connection with the units feelers Elli, 680, there being apair of such feelers related to each accumulator wheel unit. Eachyieldable connection comprises a link 68!, pivotally connected with itsfeeler and having a slotted extremity engaging a notched portion of oneof the bars 618, a spring 682 bearing against a shoulder of the link andagainst the bottom of the bar. Upon rocking movement of shaft tie framebars 678 will be depressed, and feelers are, 63%] will be rocked abouttheir pivot 58-3, each pair into contact with the selected par tialproduct plate 538 of its related group, the

spring 582 yielding when such movement is ina actuator segment 58%, inorder to reduce the number of graded steps of the partial productplates, with a consequent permissible reduction of diameter.

It will be noted that this reduction of diameter is further dependent,in the illustrated embodiment of the invention, upon the limitation ofthe tens value feelers to a travel of four steps, made possible by theemployment of the semi-complemental multipli r arrangement set forth inthe hereinbefore mentioned Fleming patent application. However, the sameadvantage would be obtained with a complete partial product table,representing values from 1 to 81, since the two ieeler arrangementshownas applied to th units values might be duplicated for the tens.

The settings of the two feelers are combined as follows:

Feeler 6'i9 has pin and slot connection with the outer end of a pivotedarm E35, mounted upon a plate 685 supported upon th auxiliary actuatorshaft 68?, arm 585 being provided with a stop lug 638 designed forcontact by one of a series of graded stop shoulders of theactuatorsegment eat, the shoulder making contact being determined by thedegree of clockwise adjustment of the feeler. The shoulders of thesegment are so spaced as to provide for 0, 3, 6, or 7 steps of movement,controlled by four evenly graded steps of the partial product plate.Feeler 589 is provided with a stop lug 5S8 designed for contact with oneof a series of three evenly graded stop shoulders of the plate 686, theshoulder making contact being determined by counter-clockwise adjustmentof the feeler, controlled by three evenly graded steps of the partialproduct plate. Upon contact of the segment with stop E88 plate 688 willbe carried counter-clockwise, against the tension of its spring see, sothat the pivotal support of arm 585 will be carried forward to allow for0, 1 or 2 steps of movement of the actuator se ment. Therefore, bycombining the settings for l or 2 steps of movement with the settingsfor 3, 6 or '7 steps any of the digits from 1 to 9 may be registered.

The tens feelers 69! are operated through a shaft 695. Keyed to shaft695is a series of arms 596 (Figs. 4, 7, and 9) having yieldable driveconnection by means of the transverse spring 691 with a series of stops698, loosely mounted upon shaft 695 and having each pin and slotconnection with a tens feeler 69L The stops and feelers are normallylocated by contact of the stops with overlying lugs of the arms 6%. Therear ends of stops 6% are designed to be contacted each by one of aseries of five graded stop shoulders of the actuator segments 684, inaccordance with the contact of feelers 69! with one of a series of fivegraded steps of the partial product plates (see Plate 5x, Fig. 10), toprovide for registration of the values 0, 1, 2, 3, 4, upon clockwiserotation of the segments. During these operations the partial productplates are held in set position by spring detents 699 (Fig. 4) engagingthe gears 537.

The auxiliary actuatorsegments 684 are driven by a pair of complementalcams F20 (Fig. 3), through cam follower Hi, link I22, arm I23 and shaft72 i. Shaft 124 has yieldable drive connection with a series of segmentsT25 (Figs. 4, 7, 8) the connection-being effected by aseriesof U- shapedplates 126, having each spline connection with the shaft and lugsupon',its opposite arms normally engaging theopposite ends of a spring 121,said spring also normally engaging lugs of two adjacent segments I25.This arrangement provides a yieldable drive of the segments upon rockingmovement of shaft 124 in either direction from the normal positionillustrated in Figure 4. Each segment 125 meshes with a pinion I28having fixed connection with one of the auxiliary actuator segments 684,so that the latter segments will be driven against the feelerconnections upon movement of shaft 124.

During each calculating cycle, the accumulator pinions 403 will bemeshed with and unmeshed from actuator segments 684 under control of acam 129 (Fig. 2). Cam 129 acts through cam follower 130 to rock an arm13!, fast with one arm of a toggle I0 which has connection with theaccumulator shaft 412.

The successive actions effected by the calculation controlling cams maybe traced on the diagram, Figure 11, as follows:

During an additive cycle of operation, cam 668 first operates the unitsfeelers to position the stop lugs 688 and 689 (Figs. 4, 7) in accordance684 and while a cam (not shown) acts to rock shaft 695 and operate thetens feelers to position the stops 698 in accordance with the tensvalues. This is the position of the parts illustrated in Figure '7, thedot dash showing of segment 684, in-

dicating a registration of nine and the fragmentary full line showingindicating a zero. Cams 120 will now act to rotate the segments 684clockwise to their normal position, to register the units and beyondsaid position, into contact with the stops 698 to register the tens, amaximum of thirteen steps of movement. Cam 568 will now retract theunits feelers and cams 120 will unmesh the accumulator pinions fromsegments 684 and mesh them again with the lister actuator segments 6H],during which time the segments 684 will be held stationary. Cams 120will next return the auxiliary actuator segments 684120 and slightlybeyond their normal position, to afford clearance with the tens stops698, which are then restored by their cam. Finally, the segments 684 aremoved through the true neutral position into their normal position ofrest, in which clearance is provided with the units lugs 688.

Example The operation of the partial product calculating mechanism abovedescribed may be illustrated by following through the actions involved 6in the calculation of the previously noted example, 4 X 775.

The partial product plates marked 4m in Figure 10 are brought oppositethe feelers 619, 680, and 69!.

Three of the partial product plate groups have been advanced torepresent the multiplicand, the groups in the hundreds and tens ordersseven steps and the units order group five steps. In the hundreds orderfeeler 619 (Fig. e) enters two steps in contacting the plate 538,positioning the lug E88 opposite the third shoulder inward from theperiphery of segment 684, to represent the value six. Feeler 68$ enterstwo steps, bringing lug 689 opposite the outer shoulder of plate 686,and thus allowing two extra steps of counterclockwise movement of thesegment, which, added to the six steps allowed by feelers 619, gives atotal of eight steps to represent the units value of the partial product23. Feeler 69! enters two steps in contacting plate 538, providing fortwo steps of movement of the thousands segment 684, In the tens orderthe feeler actions are the same, except that the units and tens of thepartial product are registered in the tens and hundreds order, so that,in the hundreds order, segment, B84 is allowed eight steps ofcounterclockwise movement and, during the return or clockwise strokewill move eight steps to its neutral position plus two steps beyond thatposition, giving a, registering movement of ten steps. Finally, in theunits order, where the partial product plates were advanced five steps,feelers 5'19 and 680 are held on the extreme outer surface of plate 538,to provide for contact of the outer shoulder of segment 684 with lug 68Band plate 686 is held against movement, so that no counterclockwisemovement of segment 684 can occur. Feeler 69! however enters two steps,so that an additional two step movement of the tens order segment 538 isprovided for, representing the partial product 20. Thus during thecalculating cycle, the four right hand segments 538 will register thevalues 2800, 280 and 20, which will be accumulated as 3100.

I claim:

In a multiplying machine having an actuator segment and a selectivelysettable partial product plate provided with two series of graded stopfaces; a member settable to variably limit the extent of movement of theactuator segment, tWo feelers each adjustable into contact with aselected stop face of its related series, and differential connectionsbetween the feelers and the settable member designed to transmitadjustable movement of one or alternatively of both said feelers tovariably set said member in accordance with the setting of the partialproduct plate.

LORING PICKERING CROSMAN.

